Remove task_id and task_filter params from XLSForm

[spwoodcock]

What type of PR is this? (check all applicable)

• 🍕 Feature
• 🐛 Bug Fix
• 📝 Documentation
• 🧑‍💻 Refactor
• ✅ Test
• 🤖 Build or CI
• ❓ Other (please specify)

Describe this PR

• Simplify logic for digitisation and mandatory fields XLSForms based on field feedback.
• Remove the task_id and task_filter fields to simplify logic.
  • They make it slightly easier to select a geometry by filtering down the available options, at the expense of complicating many things.
  • Ideally the user just selects a geom via intent and doesn't even need to open the map anyway.

Checklist before requesting a review

• 📖 Read the FMTM Contributing Guide: https://github.com/hotosm/fmtm/blob/main/CONTRIBUTING.md
• 📖 Read the HOT Code of Conduct: https://docs.hotosm.org/code-of-conduct
• 👷‍♀️ Create small PRs. In most cases, this will be possible.
• ✅ Provide tests for your changes.
• 📝 Use descriptive commit messages.
• 📗 Update any related documentation and include any relevant screenshots.

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